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<Title>SurfaceChart.getValuesAtPixel</Title>
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<p class="heading0">ChartDirector 7.0 (Java Edition)</p>
<p class="heading1"><a href="SurfaceChart.htm">SurfaceChart</a>.<wbr>getValuesAtPixel</p>
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<p class="heading2a">Usage</p>
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public double[] getValuesAtPixel(int x, int y)
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<p class="heading2">Description</p>
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Gets the (x, y, z, w) values of the surface at the specified image pixel coordinates.<br><br>
This method is valid only after the chart image has been drawn (eg. using <a href="BaseChart.makeSession.htm">BaseChart.makeSession</a>, <a href="BaseChart.makeChart.htm">BaseChart.makeChart</a> or <a href="BaseChart.makeChart2.htm">BaseChart.makeChart2</a>). It is typically used to provide user feedback when the mouse moves on the chart.<br><br>
If w values are not provided to the surface chart, the returned w value will be set to the same as the z value. If the pixel is not on the plotted surface, the returned array will be empty or null.
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<p class="heading2">Arguments</p>
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<th width="19%">Argument</th><th width="19%">Default</th><th>Description</th>
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<td>x</td><td>(Mandatory)</td><td>The x pixel coordinate.</td></tr><tr><td>y</td><td>(Mandatory)</td><td>The y pixel coordinate.</td>
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<p class="heading2">Return Value</p>
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An array of 4 numbers representing the x, y, z and w values at the image pixel location. If the pixel is not on the plotted surface, the returned array will be empty or null.
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